After finishing up the driver side, I started work on the passenger side. Here's the condition of the spark plugs below. I notice plug #1 has some sticky oil on the threads, and #3 looks glazed (NGK site points to fouled plugs):
Compared to the driver side (solid brown rust color), cylinders #1 and #3 look "splotchy." Here's a comparison photo:
I don't really know much from here, but I'm guessing these plugs are fouled up such that not all of the fuel is burned up causing the fuel smell and vapors exiting the exhaust. I'm going to get the passenger cover finished and start reassembling everything. Updates to follow...